Beagle/Treeing Walker Coonhound mix???

In march we were given a Beagle named Max. The lady who gave him to us go thim form a pet store. his papers just say beagle,(he is not registered) but everyone that sees him says he is big for a Beagle. My mother in law thinks he is Basset/Beagle mix, and a man we never met before said he raises Beagles think he is Beagle/foxhound mix.... personally i see quite a resemblance in the Beagle/Treeing Walker Coonhound mix. just wondering what you guys think??? it really does not matter if he is all beagle or a mix of something...he is one terrific dog...im just curious...his head is very small compared to his body and his muzzle is very long and narrow. he is about 15-16 inches tall and weighs about 40 pounds.
some pics
http://i169.photobucket.com/albums/u231/dana6_photo/0151280x960.jpg
http://i169.photobucket.com/albums/u231/dana6_photo/Pets/011960x1280.jpg
http://i169.photobucket.com/albums/u231/dana6_photo/Pets/0041-1.jpg
http://i169.photobucket.com/albums/u231/dana6_photo/Pets/037960x1280.jpg